The Sierra Nevada region of California is best known for its beautiful mountain and forest scenery. Fortunately, a conservation group called Sierra Watch recently launched a successful fight to make sure it stays that way.

For many years, wild bison in Montana have been unnecessarily attacked and killed by ranchers and have received no support from state and federal government agencies. The bison that reside in Yellowstone National Park are the only wild population left

World Heritage Committee meets in Cambodia, June 16-25 and will discuss the future of the Reef. We need to send a strong message that it's time to take leadership and protect this global treasure. A petition from WWF. Please sign.

I just signed a petition from Save the Bay. The only way to keep the porpoises here is to keep pollution out--and that means getting the San Francisco Regional Water Board to stand up to the worst polluters. Please sign and share.

Brazil's efforts improve monitoring of forest clearing and enforce related laws prevented the clearing of more than 59,500 km2 of Amazon forest area from 2007 to 2011, according to a new study by Climate Policy Initiative (CPI), DETERring Deforestation

Why is the U.S. okay with trashing the Arctic? Unbelievably, last month the U.S. delegation to the International Maritime Organization opposed Canada and Russia's proposal to ban ships from dumping garbage in Arctic waters.